<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- jQuery and Bootstrap files -->
    <script src="./static/js/jquery.min.js"></script>
    <script src="./static/js/bootstrap.min.js"></script>
    <link rel="stylesheet" href="./static/css/bootstrap.min.css" />
    <title>Loading...</title>
  </head>
  <body>
    <app><center><h1>Please wait when the app is loading...</h1></center></app>
  </body>
</html>
